Multiple Choice
The parasympathetic nervous system is especially active during which physiological state?
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14. The Autonomic Nervous System
Introduction to the Autonomic Nervous System
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Where are the sensors for the arterial baroreceptor reflex located?
A
Carotid sinus and aortic arch
B
Ventricles of the heart
C
Cerebral cortex
D
Pulmonary veins
Verified step by step guidance1
Step 1: Understand the arterial baroreceptor reflex. It is a mechanism that helps regulate blood pressure by detecting changes in arterial pressure and sending signals to the brain to adjust heart rate and vascular resistance.
Step 2: Identify the sensors involved in this reflex. Baroreceptors are specialized stretch-sensitive mechanoreceptors that detect changes in the pressure of the blood within arteries.
Step 3: Locate the primary sites of these baroreceptors. The carotid sinus (located at the bifurcation of the common carotid artery) and the aortic arch are the main locations where these sensors are found.
Step 4: Eliminate incorrect options. The ventricles of the heart, cerebral cortex, and pulmonary veins are not involved in detecting arterial pressure changes for the baroreceptor reflex.
Step 5: Conclude that the correct answer is the carotid sinus and aortic arch, as these are the anatomical locations of the sensors for the arterial baroreceptor reflex.
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